Recommended books for General Studies preparation in UPSC include *NCERT textbooks* for foundational knowledge, *Spectrum* for modern history, and *Laxmikant* for POLITY. Other essential resources include *Shankar IAS* for environment studies, *Economic Survey*, and *India Year Book* for current affairs. Additionally, *Ramesh Singh* is highly regarded for economic concepts. Using these sources, alongside regular updates on current events, can significantly enhance a candidate's depth and breadth of understanding, preparing them thoroughly for the exam.